# Full text of "Text Book Of Mechanical Engineering"

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```454

Crane Hooks,

used at Elswick, and has been well tested, the diagram being
given at Fig. 413,

WROUGHT IRON CRANE HOOKS (ELSWICK PRACTICE}. .

1
1-
Tons.
A.
B.
c.
D.
E.
•      P.
G.
H.

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a ,

ifij  •
Taking O = 2, we have,-by formula.,/. 453, in tons and inches,

E
i        *                              21 tons hook : ^ = 9*28, /=5,
2=6-2

i
j'                                                                              -         21          21 X
5

i
• '              rv?&       ft*    v
— 2 26 + 8 47 — -"-^ 73 tons.

\$ tons 'hook: # = 3*95,   r=2
'97j 2) = i'32

i
1   »
M'              '                                          .      / '1                                                         • '    J
_   5   H.5X2'<
^ — 1*27 + 5 '62 — 6 9   tons.              *

f> 'r\t*         T-'^rtvx

•
t||-                                                             c> yo    * 6^ ^ *

I
<v                                  i ton hook : a= 2,        r= 2
'i5> Z=  -5

•
P/ '

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i                                              .'.   /
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—       »L                        ^             ««rft^..»«rf

tons.

— 2 65 .

, */                                 .                           .  *          5 ^ -

1                ...... ............ ... ........

K

```